Y(Ba)₂O₃ catalyst loaded with 1 wt% Pd and 3.2 wt% NiO, Pd-NiO/(Y_0.99Ba_0.01)₂O₃, was found to be highly active to the selective reduction of NO with C₃H₆. The adsorption of NO on both (Y_0.99Ba_0.01)₂O₃ and Pd-NiO loaded one was studied using temperature-programmed desorption, pulsed reaction analysis and in-situ Fourier transform infrared (FTIR) spectroscopy. It was determined that NO is readily adsorbed on (Y_0.99Ba_0.01)₂O₃, primarily via the formation of nitrite and nitrate species. The addition of Pd-NiO assists in activating NO decomposition at lower temperatures as well as increasing the extent of NO adsorption. The reaction of NO with C₃H₆ and O₂ on the Pd-NiO/(Y_0.99Ba_0.01)₂O₃ was also studied using pulsed reaction analysis and in-situ FTIR under NO selective reduction condition. The results demonstrated that the mechanism involves the reaction of −C₂H_x or −CH₃ adsorption species generated via the disproportionation of C₃H₆ with nitrate species to form CNO or C₂H_xNO_y (x, y = 2,3) intermediates. These intermediates readily react with NO and O₂ to form the products CO₂, N₂ and H₂O.

发现载有1 wt％Pd和3.2 wt％NiO，Pd-NiO /（Y _0.99 Ba _0.01）₂ O _3的Y（Ba）₂ O ₃催化剂对用C ₃ H选择性还原NO具有很高的活性。₆。使用程序升温脱附，脉冲反应分析和原位傅里叶变换红外光谱研究了在（Y _0.99 Ba _0.01）₂ O ₃和Pd-NiO上NO的吸附。确定NO易于吸附在（Y _0.99 Ba _0.01）₂ O _3上，主要是通过亚硝酸盐和硝酸盐物种的形成。Pd-NiO的添加有助于在较低温度下激活NO分解，并增加NO的吸附程度。还利用脉冲反应分析和原位FTIR在NO选择性还原条件下研究了NO与C ₃ H ₆和O ₂在Pd-NiO /（Y _0.99 Ba _0.01）₂ O _3上的反应。结果表明，该机理涉及通过C ₃ H ₆歧化产生的-C ₂ H _x或-CH ₃吸附物种的反应。与硝酸盐物质形成CNO或C ₂ H _x NO _y（x，y = 2,3）中间体。这些中间体容易与NO和O反应₂以形成所述产品CO ₂，N ₂和H ₂ O.